Almost tiring with Santa nearly out and on the way (2,7)
I believe the answer is:
in transit
'on the way' is the definition.
(I've seen this before)
'almost tiring with santa nearly out' is the wordplay.
'almost' means to remove the last letter (most of the word but not all of it).
'with' means one lot of letters go next to another.
'nearly' means to remove the last letter.
'out' indicates an anagram (out can mean wrong or inaccurate).
'tiring' with its last letter removed is 'tirin'.
'santa' with its last letter taken off is 'sant'.
'tirin'+'sant'='tirinsant'
'tirinsant' anagrammed gives 'IN TRANSIT'.
'and' is the link.
(Other definitions for in transit that I've seen before include "Being transported" , "En route" , "(Of goods) being moved" , "during journey" , "on the wagon?" .)